so I bought the game today...

Was playing for a good few hours, mostly story mode, a bit of Devil Within ... and the only player I managed to beat story mode with in Hwoarang. I tried it with most characters, put the rounds to 1, and I couldn't beat that final boss, what's-his-name, flame ball guy who backs away from all my moves and then hits me with his fire balls and that's it, I'm gone. If the first flame ball attack doesn't do it, he does it again. Even Steve let me down, and I can usually beat everyone with Steve.

Any hints, or am I doomed to never unlock the other characters and the closing movies?

"You fill your days with creating worlds which have meaning and order because ours doesn't."